Centrifugal liquid-separator.



No. 793,222. PATENTED JUNE 27, 1905. E. U. PAWLEY & A. W. RUWELL. CBNTRIIUGAL LIQUID SEPARATOR.

APPLICATION FILED APR.10,1905.

3 SHEETB-BHEET l.

No. 798,222. PATENTED JUNE 27, 1905. E. G. PAWLEY & A. W. RUWBLL.

OBNTRIFUGAL LIQUID SEPARATOR.

APPLICATION FILED APR.10,1905.

3SHEETS-SHBET z.

a a a 7 o \5 J/o R0 w W/% 2 7///// M Z Z w 2 l No. 793,222. PATENTED JUNE 27, 1905. E. G. PAWLEY & A. W. RUWELL.

GENTRIPUGAL LIQUID SEPARATOR.

APPLICATION FILED APB.10, 1905.

3 SHEETS-SHEET 3.

'IJNTTED STATES Patented June 27, 1905.

PATENT OFFICE.

ERNEST (I. PAWLICY, OF CHICAGO, ANI) ALBERT W. HUIVIDLL, ()F SYUA- MORE, ILLINOIS, ASSIGNORS TO SMITH MANUFAUTURING COMPANY, ()F ()IIIOAGO, ILLINOIS, A COltltHtATlON OF ILLINOIS.

CENTRIFUGAL LIQUID-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 793,222, dated June 27, 1905.

Application filed April 10, 1905. Serial No. 254,734..

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Be it known that we, Enxns'r O. PAWLEY, residing at (,lhicago, in the county of Cook, and ALBERT IV. hUwnLL, residing at Sycamore, in the county of Dekalb, State of Illinois, both citizens of the United States, have invented certain new and useful Improvements in Centrifugal Liqaid-Separators, of which the following is a specification.

This invention relates to certain new and useful improvements in that class of centrifugal separators employed for separating liquids of different densities, and while it is more especially intended for use in creamseparators or those used for separating full milk into cream and skim-milk, yet it is applicable for separators employed for separating other compound liquids into their constituent liquids of different specific gravities; and it consists in certain peculiarities of the construction, novel arrangement, and operation of the various parts thereof, as will be hereinafter more fully set forth and specifically claimed.

The principal objects of the invention are to provide a separator of the above-named character which shall be simple and inexpensive in construction, strong, durable, and so made that a more perfect or efficient separation of the constituent elements or liquids of different specific gravities will be secured, to provide means for controlling the discharge of the cream or lighter constituent liquids, and to secure numerous other advantages and beneficial results, some of which may be hereinafter referred to in connection with the description of the working parts and operation of the device.

In order to enable others skilled in the art to which our invention pertains to make and use the same, we will now proceed to describe it, referring to the accompanying drawings, in which Figure 1 is a view in side elevation of the skimmer, showing it removed from the bowl or drum. Fig. 2 is a detached perspective view of one of the vertical wings or blades of the skimmer. Fig. 3 is a central vertical sectional view of the lid or cover for the bowl or drum, showing it provided with outletconduits for the milk and an adjustable outlet for the cream. Fig. i is a view, partly in elevation and partly in section, taken on lines at 4 of Figs. 5 and 6 looking in the direction indicated by the arrows and showing the skimmer located in the bowl and the lid or cover for the latter secured in place by means of the central supply-bolt. In this view the parts have been shortened for the convenience of illustration. Fig. 5 is a plan view of the skimmer. Fig. 6 is a cross-sectional view thereof, taken on line 6 6 of Fig. 1 looking in the direction indicated by the arrows. Fig. 7 is a fragmental plan view of the lid or cover for the bowl, and Fig. 8 is a similar view of the bowl with the skimmer removed.

Like numerals of reference refer to corresponding parts throughout the different views of the drawings.

The reference-numeral 10 indicates the bowl or drum, which may be made of any suitable size, form, and material, but preferably of metal and cylindrical in shape, as shown in Fig. I of the drawings. The upper end of the bowl 1() is open and is provided in its rim with an annular groove 11 to receive a cord 12, of rubber or other suitable flexible material, which is employed to form a tight joint between the upper end of the bowl and the lid or cover 13 therefor. The lower end of the bowl is closed and is provided at its center with a downwardly-extendingshaft14, which is formed with worm-threads 15 to engage a worm-gear of a suitable driving mechanism (not shown) used for rapidly rotating the bowl. The central portion of the bottom of the bowl is provided with an upwardly-projccting and internally-screw threaded hollow sleeve or tube 16, which has in its lower portion a series of openings 17, through which the full milk is discharged into the bowl. Extending laterally from the lower portion of the sleeve or tube 16 is a feather 18 to engage a spline or slot 19 in the lower plate or disk 20 of the skimmer, thus fixedly securing thelatter within and to the bowl. As is clearly shown in Figs. 1, 2, 5, and 6 of the drawings, the skimmer comprises a series of vertical wings 21, each of which is angular in cross-section and are secured together at their lower and upper ends by means of circular plates or disks 20 and 22, respectively, each of said disks having a central opening, as shown, that of the upper disk 22 being larger than the opening of the disk 20 or lower one.

By reference to Figs. 1, 4, and 6 of the drawings it will be seen that the lower disk or plate 20 is less in diameter than the upper plate 22 and when secured to the lower ends of the wings 21 has its inner periphery about flush with theinner angles of said wings, while its outer periphery does not extend to the outer edges of the wings. The upper plate or disk 22 when secured to the upper ends of the wings 21 has its outer periphery in circular alinement with the outer edges of said wings and has on its inner periphery an upturned annular flange 23 for the purpose to be presently explained. Each of the wings 21 is preferably provided at its upper end with a horizontallyextending lug 24, which is apertured to receive a rivet used for securing it to the plate 22 near its outer periphery. Each of the wings 21 is also provided at its lower end near the inner angle of said wing with a laterally-extending apertured lug 25 to receive a rivet for securing it to the lower plate. These lugs may sometimes be omitted, and the ends of the wings may be soldered or otherwise secured to their respective plates. As shown in Figs. 1, 2, and 4, the lugs 25 on the wings 21 project somewhat below the lower ends of the wings and as they are secured to the upper surface of the plate 20, which, as before stated, has its outer periphery located inwardly at a distance from the outer edges of the wings, will provide an annular space between the inner surface of the wall of the bowl and the outer periphery of the lower ring, which will act as a trap or receptacle-.26 for the collection of dirt and foreign substances contained in the milk.

By reference to Figs. 2 and 6 itwill be seen that each of the wings 21 is substantially V- shaped in cross-section with its acute angle presented inwardly and that each of said wings has a wide flange 27 and a narrow flange 28, the latter being provided at its outer edge with a series of extensions 29, which are preferably formed with openings to receive rivets used for securing them to the front surface of the wider flanges 27 and on a longitudinal line at about the middle thereof. By thus forming the shorter flanges 28 of the wings with extensions 29 it is apparent that longitudinal openings or cut-away portions 30 will be provided between the outer edge of each of the narrow flanges and the front surface of each of the wide flanges, each of which is provided with a series of openings 31,which may be suitably arranged, but preferably in vertical rows, as shown. Each of the wings 21 is provided in its inner angle with a series of openings 32, which are preferably larger than the openings 31 and are for the passage of the lighter particles of the liquid. The outer portion of the upper end of each of the flanges 27 is cut away, as at 33, to form hori- Zontal rests for the plate 22, the upturned flange 23 of which will rest against the vertical portions 34 of said flanges and may be secured thereto by means of solder or otherwise. When the upper plate 22 is secured in position, as shown in Fig. 1 of the drawings, it is apparent that the inner angular portions of the wings 21 will project somewhat above the flange 23 on said plate and that each of these upward projections will have an opening 32 in its inner portion. The lower end of each of the narrow flanges 28 is cut away, as at 35, to permit of the free passage of the full milk as it flows from the openings 17 from the supply-tube bolt to the separate chambers 36, formed by the wings of the skimmer. Each of the wide flanges 27 is deflected fromavertical line at about its middle forwardly or in the direction of the rotation of the bowl, thus forming anobtuse angle near the cut-away portions 30 of each of the narrow flanges 28 of the wings. That portion of each of the wings projecting above the flange 23 of the top plate is upwardly and inwardly inclined or beveled, so that the cap 37, which is frustum-shaped and which fits snugly around the flange 23, may rest slightly above the beveled ends of the wings. Detachablylocated on the upper end of the bowl 10 is a lid or cover 13 therefor, which is substantially conical in shape and has a central vertical opening 13 to receive the retaining-bolt 38, which is hollow and has on its upper end a head 39 to rest on the upper portion of the lid. The lower end of the tubular bolt 38 is screw-threaded to engage the threads on the sleeve 16, which extends upwardly from the bottom of the bowl. The lower portion of the lid 13 is provided near its rim with an annular groove 40 to receive a portion of the packing-ring 12, which, as before stated, is secured in a groove in the upper end of the bowl. The lid 13 is provided with a series of radially-disposed conduits 41 for the passage of the blue or skim milk, and each of said conduits has its upper end open through the top of the lid. and its lower end open below the horizontal rim 42 of the lid, so that when the latter is placed in position on the top of the bowl and secured in place by means of the bolt 38 the lower ends of the conduits 41 will lie close to the inner surface of the bowl, yet at a suflicient distance therefrom to permit IIO the milk to pass therebetween. The neck or upper portion of the lid 13 is provided with a cream-outlet opening 4:3, in which is screwed a hollow plug it, employed for regulatii'ig the flow of the cream. The upper ends of the conduits 4C1 are adapted to communicate with a milkspout, while the opening *3 is adapted to communicate with a spout or con duit for carrying oft the cream.

When the parts are assembled as shown in Fig. 1 of the drawings and as above described, it is apparent that the bowl may he rotated with great rapidity by any suitable means and the full milk supplied from a suitable reservoir located above the lid 13 through the center retaining bolt or tube 38, from which it will be discharged through the openings 17 into the separate chambers 36 of the skimmer formed by the vertical wings. In this operation the heavier particles of the milk or liquid are thrown to the periphery of the bowl, while the lighter particles or cream will flow toward the center thereof. in the separation of milk the greater portion of the light particles or cream are immediately freed from the heavier portions or milk. llowever, this separation is not complete; but as the wings of the skimmer a re set at proper angles they will draw the liquid away from the wall of the bowl toward the center thereof. In its movement toward the center of the bowl the milk will be forced through the small openings 31 in the wide flanges 27 of the wings, and more of the lighter particles or cream will thereby be freed and will move toward the center of the bowl at the rear of the wings, while the heavier particles are again driven to the wall of the bowl, where it is immediately caught by the succeeding wing and the above-named process repeated, by which the milk while rising from the bottom to the top of the bowl, where it is discharged through the conduits 11 in the lid or cover, is freed from the cream or light particles. The same when freed from the heavier particles by the above-named-oporation passes through the larger holes 32 at the inner angles of the wings and collects in the center of the bowl around the tubular bolt 3b, where it rises and will find its way out through the cream -discharge opening 13 in the neck or contracted portion of the lid or cover for the bowl. The longitudinal open ings 30 will permit any of the heavier particles or blue milk which may pass through the openings 32 with the lighter particles or cream to again be centrifugally forced through said longitudinal openings towardthe wall of the bowl, when it will again be forced through the smaller openings 31 in the wide flanges of the wings.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. in a centrifugal separator, the combination with a rotary bowl having in its bottom a hollow inward projeetum provided with a series of openings, of a corrugated skimmer within the bowl and rotated thereby, said skimmer consistingof a series of juxtaposed wings angular in crosssection arranged with their inner angles and outer edges in concentric relation, and upper and lower plates secured to thewings, each of saidwings having its lower portion recessed to register with the openings in said hollow projection and its upper part recessed to receive the upper plate and inwardly inclined above said plate, and a frustum-shaped cap located over and around the portion of the wings above the upper plate, substantially as described.

2. In a centrifugal separator, the combination with a rotary bowl having in its bottom a hollow inward projection provided with a series of openings, of a corrugated skimmer within the bowl and rotated thereby, said skimmer consisting of a series of juxtaposed wings angular in cross-section arranged with their inner angles and outer edges in concentric relation, and upper and lower plates secured to the wings, each of said wings having a series of small openings near its outer edge and a series of larger openings in its inner angle and its lower portion recessed to register with the openings in said hollow projection and its upper part inwardly inclined above the upper plate, and a frustumshaped cap located over and around the portion of the wings above said upper plate, substantially as described.

In a centrifugal separator, the combination with a rotary bowl having in its bottom an inward hollow projection provided with a series of openings, of a corrugated skimmer within the bowl and rotated thereby, a circular plate having a central opening and secured to the bottom of the skimmer so as to leave a space between the periphery of the plate and the wall of the bowl, a frustum-shaped cap titted over and around a part of the upper portion of the skimmer, a lid for the bowl having radial conduits for the outlet of blue milk and an outlet-opening provided with a hollow adjustable plug for the discharge of cream, and a tubular bolt located in openings in the said. lid and cap and secured at its lower end to the hollow projection of the bowl, substantially as described.

4. In a centrifugal separator, the combination with a rotary bowl having in its bottom an inward hollow projection provided with a series of openings, of a corrugated skimmer within the bowl and having in its lower portion recesses to register with said openings, a circular plate secured to the lower portion of the skimmer so as to leave a space between the periphery of the plate and wall of the bowl, an upper circular plate having a central opening provided with an upturned llange and located on the upper portion of the skimlner, a frustuIn-shaped cap fitted around said end to the hollow projection of the bowl, subflange and extending above the inner upper stantially as described.

portion of the skimmer, a lid for the bowl 1 1 1 7 7 having radial conduits for the outlet of blue milk and an outlet-opening provided with a 1 hollow adjustable plug for the discharge of \Vitnesses: cream, and a tubular bolt located in openlngs GEORGE H. MILLER, in said lid and cap and secured at its lower SIMON C. JoHNsoN. 

